Combined script with functions to add/delete and list event receivers (including RERs) on a SharePoint list

ManageRemoteEventReceivers.ps1

. .\TopOfScript_PSCSOM.ps1

function listEventReceivers([Microsoft.SharePoint.Client.ClientContext]$context, [string]$listName) 
{
    Write-Host "Attempting to iterate event receivers on list '$listName'"

    $list = $context.Web.Lists.GetByTitle($listName); 
    $context.Load($list)
    $eventReceivers = $list.EventReceivers
    $context.Load($eventReceivers)
    $context.ExecuteQuery()

    Write-Host "Found" $eventReceivers.Count "receiver(s) on this list"

    foreach ($er in $eventReceivers)
    {
        Write-Host ("Found ER: " + $er.ReceiverName)
        Write-Host ("   ReceiverClass: " + $er.ReceiverClass)
        Write-Host ("   ReceiverAssembly: " + $er.ReceiverAssembly)
        Write-Host ("   EventType: " + $er.EventType)
        Write-Host ("   ReceiverUrl: " + $er.ReceiverUrl)
        Write-Host ("   Synchronization: " + $er.Synchronization)
    }
}

function addListItemRemoteEventReceiver([Microsoft.SharePoint.Client.ClientContext]$context, [string]$listName, 
    [Microsoft.SharePoint.Client.EventReceiverType]$eventType, [Microsoft.SharePoint.Client.EventReceiverSynchronization]$synchronization, 
    [string]$receiverName, [string]$receiverUrl, [string]$receiverAssemblyName, [string]$receiverClassName)
{
    $list = $context.Web.Lists.GetByTitle($listName); 
    $context.Load($list)
    $eventReceivers = $list.EventReceivers
    $context.Load($eventReceivers)
    $context.ExecuteQuery()

    $newRER = New-Object Microsoft.SharePoint.Client.EventReceiverDefinitionCreationInformation
    $newRER.EventType = $eventType
    $newRER.ReceiverName = $receiverName
    $newRER.ReceiverClass = $receiverClassName
    $newRER.ReceiverAssembly = $receiverAssemblyName
    $newRER.ReceiverUrl = $receiverUrl
    $newRER.Synchronization = $synchronization
    $newRER.SequenceNumber = 10
 
    try
    {
        $list.EventReceivers.Add($newRER)
        $list.Update()
        $context.ExecuteQuery()
        Write-Host "Receiver added successfully"
    }
    catch
    {
        Write-Error "Failed to add receiver - error:  $_"
    }
}

function deleteListItemRemoteEventReceiver([Microsoft.SharePoint.Client.ClientContext]$context, [string]$listName, [string]$receiverName)
{
    Write-Host "Attempting to delete RER with name '$receiverName' on list '$listName'"

    $list = $context.Web.Lists.GetByTitle($listName)
    $context.Load($list)
    $eventReceivers = $list.EventReceivers
    $context.Load($eventReceivers)
    $context.ExecuteQuery()

    $specifiedEr = $null
    try
    {
        foreach ($er in $eventReceivers)
        {
            if ($er.ReceiverName -eq $receiverName)
            {
                $specifiedEr = $er
            }
        }

        if ($specifiedEr -ne $null -and !$specifiedEr.ServerObjectIsNull.Value)
        {
            $specifiedEr.DeleteObject()
            $context.ExecuteQuery()
            Write-Host "Receiver deleted successfully"
        }
        else
        {
            Write-Error "Failed to find receiver with name '$receiverName'"
        }
    }
    catch
    {
        Write-Error "Failed to delete receiver - error:  $_"
    }
}

# TODO: replace these parameters with your own!
$listName = "Items"
$receiverName = "COB_ListItemAdding"
$receiverClassName = "RER_ListItemAdded"
$receiverEventType = [Microsoft.SharePoint.Client.EventReceiverType]::ItemAdding
$receiverSynchronization = [Microsoft.SharePoint.Client.EventReceiverSynchronization]::Synchronous
$receiverUrl = "https://cobspdev.azurewebsites.net/Services/MyService_ListItemAdded.svc"
$receiverAssemblyName = "COB-SP-RemoteCodeWeb, Version=1.0.0.0, Culture=neutral, PublicKeyToken=foo"

# add
addListItemRemoteEventReceiver $clientContext $listName $receiverEventType $receiverSynchronization $receiverName $receiverUrl $receiverAssemblyName $receiverClassName

# delete
deleteListItemRemoteEventReceiver $clientContext $listName $receiverName

# list
listEventReceivers $clientContext $listName